Nietzsche said that the earth has been a madhouse long enough. Without contradicting him we might perhaps soften the expression, and say that philosophy has been long enough an asylum for enthusiasts.

Saints cannot arise where there have been no warriors, nor philosophers where a prying beast does not remain hidden in the depths.

Religion is indeed a convention which a man must be bred in to endure with any patience; and yet religion, for all its poetic motley, comes closer than work-a-day opinion to the heart of things.

A man's memory may almost become the art of continually varying and misrepresenting his past, according to his interest in the present.

Life is judged with all the blindness of life itself.

In endowing us with memory, nature has revealed to us a truth utterly unimaginable to the unreflective creation, the truth of immortality....The most ideal human passion is love, which is also the most absolute and animal and one of the most ephemeral.

Sanity is madness put to good use.